Exact numbers are not always necessary; Approximation is used when exact numbers are not required and a general idea of quantity is sufficient
Rounding Up:
Example:
- Ordering \(750\) sweets for \(732\) people.
- If there are \(732\) people at a school event, the principal might order \(750\) sweets to ensure there is enough for everyone.
Rounding Down:
Used when a slightly lower estimate is sufficient for the context
Example:
If an item costs \(₹470\), a shopkeeper might tell a customer it costs around \(₹450\) to simplify the price
Nearest Neighbors:
Identifying the "nearest neighbor" involves rounding a number to its closest thousand, lakh, or crore to simplify calculations .
Example:
The nearest neighbours of the number \( 6,72,85,183 \) are shown in the table below.
| Scale | Nearest Neighbor |
| Nearest Thousand |
6,72,85,000
|
| Nearest Ten Thousand |
6,72,90,000
|
| Nearest Lakh |
6,73,00,000
|
| Nearest Ten Lakh |
6,70,00,000
|
| Nearest Crore |
7,00,00,000
|